| 摘要 |
A phantom for evaluating the operating performance of a magnetic resonance imaging scanner system includes a generally tubular body enclosed at its ends and containing a cylindrical stack of a plurality of leaves. Each leaf has one or more wedge-shaped slices or sectors cut out for identification and reference purposes. Leaves having one, two and four slices formed therein are arranged in a predetermined order in the stack with the slices in a predetermined helical pattern approximately eighteen degrees apart. The container is filled with a liquid and is inserted in the magnetic resonance imaging system to obtain images which can be evaluated to determine if the system is in calibration. A typical evaluation determines MRI slice thickness, slice location, and contiguity of the slices.
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